The most important thing is that you can get a good idea of what you’re looking for.
The most important thing is that you can get the most out of your life. The most important thing is that it is very difficult to explain the pathogenesis of vitiligo with a single factor.
The clinical typing criteria of vitiligo developed by the Chinese Pigmented Dermatology Group in 1994 divided vitiligo into two types (common type, segmental type), two categories (complete white class, incomplete white spot), two (stable phase, progressive phase.
Vitiligo basic diagnostic points: (1) hair, face, trunk and limbs and other parts of the body, the appearance of size, single or multiple irregular pure white plaques, white plaques area gradually expanded, the number of increased.
(2) The white patches have clear boundaries, and the hair inside the patches is also white, with smooth surface, no scaling or crusting, and normal sensory and secretory functions.
(3) The white spots are sensitive to sunlight and will become red when slightly exposed to sunlight.
(1) Anemic nevus is a limited hypopigmented spot, but not a pigment loss. The lesions do not redden locally when rubbed with force, but the surrounding normal skin reddens.
(2) Mottled nevus is an autosomal dominant disease, the lesions are present at birth, most commonly on the frontal area, combined with white hair, the white spots are often triangular or diamond-shaped, the rash can also occur on the chest, abdomen and proximal extremities.
(3) Non-pigmented nevus occurs at birth or soon after birth, and is a well-defined hypopigmented spot that lasts for a lifetime. Histopathology shows normal or reduced number of melanocytes, normal size and function of melanosomes.
(4) Idiopathic hypopigmentation and senile leukoplakia are round or polygonal white spots with clear boundaries, 2-6 cm in diameter, commonly found on the forearm and the extensor side of the lower leg, and their number increases with age. The latter is common in the elderly, mainly in the chest, back and limbs, as bean-sized round white spots, slightly depressed, scattered distribution, not fused.
(5) Other sometimes need to pay attention to distinguish with lichen planus, hypopigmented spots due to pityriasis simplex, also distinguish with leprosy white spots, phase II syphilis white spots.